xe_pagefault_handler(9)

✨ xe_pagefault_handler(9) ✨

okay so this is a page from the Kernel API Manual bestie, and honestly? it's a little one but it's a cutie 🎀 it's all about xe_pagefault_handler, which — iykyk — is the page fault handler. yes THAT kind. let's get into it 🦋

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🌸 NAME 🌸

xe_pagefault_handler — the page fault handler. literally what it says on the tin 💅

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⭐ SYNOPSIS ⭐

int xe_pagefault_handler (struct xe_device *xe , struct xe_pagefault *pf
);

note the return type: int. keep that in mind for the RETURN section, ok? 👀

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🎀 ARGUMENTS 🎀

• xe — the xe device instance 🖥️ like, the actual GPU device you're dealing with
• pf — the page fault itself. the whole reason we're here 💀

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🫶 DESCRIPTION 🫶

okay so here's the vibe: this function sinks the page fault to a queue (that queue is a memory buffer, fyi) and then queues a worker to service it. that's it. that's the whole job. hot girl summer but make it deferred work 🔥

and the iconic part? it's safe to be called from IRQ or process context. both. no cap. so like, wherever you're calling from, you're fine 🧚

also — and this matters — it's Reclaim safe ✨ which is the kind of thing you only appreciate once you've been burned before, trust.

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👑 RETURN 👑

• 0 on success 🎉 (slay)
• errno on failure 😭 (not slay, but at least you know)

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💜 SEE ALSO 💜

• Kernel file ./drivers/gpu/drm/xe/xe_pagefault.c — go read the source bestie 📖
• Xe page faults(9)
• xe_pagefault_init(9)
• xe_pagefault_reset(9)

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🌈 fr fr if you're touching page faults you already know: read the source, check the return value, don't skip the queue behaviour. main character energy only 💅

that's the page!! mwah 🍓 — with love from ./drivers/gpu/drm/xe, October 2026, and yes we're still on xe_pagefault_handler(9) 💖